Why would you want to fix it? Good question. But just in case you want to use it on a plinker 22... I got a "ruined" tasco on a 110 F series I just bought. The lenses were blurry and flaking on from the inside. I called Bushnell (the owner of Tasco) and they want $48 dollars to fix a $56 scope. Not going to happen and I won't buy from them. That's another topic. My 110 likes its new Redfield friend.
I found out that the entire scope comes apart. Here's how I cleaned it and you can too if you have 30 minutes to kill. I don't know all of the actual names for scope parts, so I tried to think of descriptive terms.

1. Loosen the lock nut on the focus end of the scope.
2. Unscrew the end off of the scope.
3. Notice the two slots opposite of each other on the inside of the lens housing. Take a small screwdriver and use it to unscrew the internal threaded ring.
4. The inside lens is now loose. Make sure you pay attention and notice that the concave end of the internal lens is facing the optic.
5. Remove the internal lens and clean it.
6. Put the lens back in the way it came out and screw the threaded ring back in until it is snug.
7. Hold the very end of the scope with one hand and hold the bell housing with the other, then unscrew the external lens.
8. Clean the external lens and then put it back together.
9. The objective lens also comes out simply by unscrewing the objective end of the scope. Notice how far in the outside ring is set on the objective side. This effects paralax.

If that doesn't work, throw it in the trash :-)

Hope that helps.

Ben